[GRASS-dev] Re: [Ffmpeg-devel] Problems with preC99 compilers

[Glynn Clements]

Markus Neteler wrote:

> For the record, here a followup...

... which completely misses the point.

> > > I was compiling recent GRASS GIS version but it failed on ffmpeg includes due 
> > > to one line comments. One line comments (//) where introduced in C99, thus 
> > > preC99 compilers do not understand them.
> > 
> > All widely used compilers from the past several years understand them.
> > Even the obsolete gcc versions from before any real C99 support
> > understood them.
> > 
> > > gcc version 4.1.2 20060920 (prerelease)
> > 
> > Supports not only // but most of the more complex features of C99 too.
> > 
> > > Error message:
> > > gcc -I/home/maris/soft/grass-6.2.0RC1/dist.i686-pc-linux-gnu/include  -g -ansi -Wall
> > 
> > The -ansi switch explicitly sets the standard back to C89 and disables
> > support for any features of current C and GNU extensions that were not
> > present in C89. Remove that switch and it'll compile.

Shorter version: "we aren't going to fix it".

It isn't really a problem; ffmpeg itself won't compile on a system
which only supports C89. But as Maris suggests, we might want to
document this issue somewhere.

-- 
Glynn Clements <glynn at gclements.plus.com>